In Cisco SD-WAN, which protocol is used to measure link quality?
Click on the arrows to vote for the correct answer
A. B. C. D.D.
The protocol used to measure link quality in Cisco SD-WAN is the Bidirectional Forwarding Detection (BFD) protocol, which is a lightweight protocol designed to detect failures in the forwarding path between two systems.
BFD runs as a separate process and can be used to detect failures in physical links, virtual circuits, and tunnels, as well as to quickly identify changes in link status. It is used in Cisco SD-WAN to measure the quality of the links and the performance of the underlying network.
BFD is used to provide rapid failure detection and to quickly converge the network. It sends periodic heartbeat messages between the endpoints of the link, which is usually a router or a switch. If there is a failure or congestion on the link, BFD can detect it and alert the network devices to take action.
BFD is an important protocol in Cisco SD-WAN, as it helps ensure that the network is always performing optimally and that any issues are detected and addressed quickly.